<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <img src="./images/1.webp" alt="">
  <script>
    // 只要用到随机数，就写一个函数 n到m的随机数
    function random(N,M){
      return Math.floor(Math.random()*(M-N+1)+N)
     }



    // 1. 获取图片对象
    let img =document.querySelector('img')

    // 2. 随机得到序号
    let i=random(1,6)
    // 3. 更换路径
    img.src =`./images/${i}.webp`
  </script>
</body>

</html>